How DNSSEC Works explains DNS Security Extensions through an illustrated guide to its purpose and operation.
Hackers101
Hacker101 offers a free web security class with lessons and Capture the Flag challenges.
About Hackers101
Hacker101 is a free class for web security for programmers interested in bug bounties and seasoned security professionals. It combines instruction with hands-on practice. Newcomers follow a starting path, and reaching 26 CTF points can lead to invitations to private programs.
Pricing is not clearly stated.
Key features
- Free video lessons, guides and resources
- CTF levels inspired by the real world
- Newcomers Playlist covering basics and reporting
- Guidance on Burp Suite and web hacking essentials
Best for: Programmers with an interest in bug bounties and seasoned security professionals
Hackers101 at a glance
- Website
- hacker101.com
- Category
- Education & Learning › Learn to Code
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Details verified
- Oct 23, 2026 · Official source
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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